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Patent US2820043A successfully refreshed from Google Patents.
US2820043A
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Preparation of imidazoline propionic acid derivatives
Assignee: Rohm and Haas Co
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Filing: 1954-10-26
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Granted: 1958-01-14
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Expires: 1974-10-26
Abstract
No abstract record available.
Inventors
- 👤 James L Rainey
- 👤 William G Rinear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:24
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/494; A61K8/4946; A61Q; A61Q5/00; A61Q5/02; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A PROCESS FOR PREPARING AN ESTER OF THE STRUCTURE
Claim 2
Dependent Claim
9 words
A PROCESS FOR PREPARING AN ESTER OF THE STRUCTURE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |